Two Co40Fe40B20 film samples. L is the length and w the width. iac is the ac current sent through each sample. is the saturation magnetization and is the deposition field. and are the in-plane spin-wave wave vectors. (a) The ||L case and (b) the ||w case.
Jen et al. Nanoscale Research Letters 2011 6:468 doi:10.1186/1556-276X-6-468